Kegaki, or hair painting, is a step where fine brushes are used. Each line is painted in a single stroke. Several hundred strokes are required to suggest the hair of a beard. A mistake here would mean having to go back to the base coat, so much concentration is required.
This is a fresh mask. The final state is the aging (koshoku-zuke). A new mask would not fit with the atmosphere of Noh; a mask must be made to look aged, as if it had been created 400-600 years ago. Even from the beginning, masks were made to look older. The aging processes are among the most tightly kept secrets of Noh mask carvers.
"For me, "mask-making" is not a simple expression of representational art of superficies. It is a task of materializing the "narrative" hidden behind each face.” Bidou Yamaguchi This is the mask after the aging process.